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3 years ago

Susan rides her bicycle 5 miles in 2/5 of an hour .at this rate how many miles could she ride in 2 hours

Mathematics

2 answers:

Oksi-84 [34.3K]3 years ago

6 0

Divide 5 by 2 = 2.5 per 1/5 an hour
there are 10 of 1/5 an hour in 2 hours
so 10 X 2.5 = 25 miles in 2 hours

finlep [7]3 years ago

3 0

She rides 1 mile per half hour so she rides 4 miles in 2 hours cuz there is 4 half hours in 2 hours

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alexandr1967 [171]

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3 years ago

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3 years ago

1) Use power series to find the series solution to the differential equation y'+2y = 0 PLEASE SHOW ALL YOUR WORK, OR RISK LOSING

iogann1982 [59]

$y=\displaystyle\sum_{n=0}^\infty a_nx^n$

then

$y'=\displaystyle\sum_{n=1}^\infty na_nx^{n-1}=\sum_{n=0}^\infty(n+1)a_{n+1}x^n$

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$\displaystyle\sum_{n=0}^\infty(n+1)a_{n+1}x^n+2\sum_{n=0}^\infty a_nx^n=0$

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$\implies\begin{cases}a_0=y(0)\\(n+1)a_{n+1}=-2a_n&\text{for }n\ge0\end{cases}$

We can solve the recurrence exactly by substitution:

$a_{n+1}=-\dfrac2{n+1}a_n=\dfrac{2^2}{(n+1)n}a_{n-1}=-\dfrac{2^3}{(n+1)n(n-1)}a_{n-2}=\cdots=\dfrac{(-2)^{n+1}}{(n+1)!}a_0$

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3 years ago

Subtract. (6x + 5) - (x + 3) A. 5x + 2 B. 6x + 2 C! 6x + 8 D. 5x + 8

Natali [406]

Answer: 5x + 2

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

Two kilograms of bronze costs £7.20 What is the cost of 300g of bronze

sineoko [7]

We know that
1 Kg is equals to--------------> 1000 g
so
X Kg------------------------> 300 g
X=300/1000------> x=0.30 Kg

if 2 Kg cost--------------> £7.20
0.30 Kg-------------> X
X=0.30*7.20/2------> x=1.08

the answer is
£1.08

3 0

3 years ago